The Destroy command releases the resources associated with the mutexes specified as arguments.

To create a mutex, use the Create command.

For more information on using mutexes, see the Mutex help page.

p := proc( m )
   global count;
   print( count );
   count := count+1;
end proc;

$p≔\mathbf{proc}\left(m\right)\mathbf{global}\mathrm{count}\;\mathrm{print}\left(\mathrm{count}\right)\;\mathrm{count}≔\mathrm{count}\+1\mathbf{end\; proc}$

$\mathrm{count}≔1$

$\mathrm{count}≔1$

$\mathrm{Threads}\left[\mathrm{Wait}\right]\left(\mathrm{seq}\left(\mathrm{Threads}\left[\mathrm{Create}\right]\left(p\left(m\right)\right)\,i=1..10\right)\right)$

$1$

$2$

$3$

$4$

$5$

$6$

$6$

$8$

$8$

$10$

p := proc( m )
   global count;
   Threads[Mutex][Lock]( m );

   print( count );
   count := count+1;

   Threads[Mutex][Unlock]( m );
end proc;

$p≔\mathbf{proc}\left(m\right)\mathbf{global}\mathrm{count}\;\mathrm{Threads}\[\mathrm{Mutex}\]\[\mathrm{Lock}\]\left(m\right)\;\mathrm{print}\left(\mathrm{count}\right)\;\mathrm{count}≔\mathrm{count}\+1\;\mathrm{Threads}\[\mathrm{Mutex}\]\[\mathrm{Unlock}\]\left(m\right)\mathbf{end\; proc}$

$\mathrm{count}≔1$

$\mathrm{count}≔1$

$m≔\mathrm{Threads}\left[\mathrm{Mutex}\right]\left[\mathrm{Create}\right]\left(\right)$

$m≔1$

$\mathrm{Threads}\left[\mathrm{Wait}\right]\left(\mathrm{seq}\left(\mathrm{Threads}\left[\mathrm{Create}\right]\left(p\left(m\right)\right)\,i=1..10\right)\right)\:$

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

$\mathrm{Threads}\left[\mathrm{Mutex}\right]\left[\mathrm{Destroy}\right]\left(m\right)$